CN111248126A - Technological method for breeding river snails in rice field - Google Patents
Technological method for breeding river snails in rice field Download PDFInfo
- Publication number
- CN111248126A CN111248126A CN202010253972.7A CN202010253972A CN111248126A CN 111248126 A CN111248126 A CN 111248126A CN 202010253972 A CN202010253972 A CN 202010253972A CN 111248126 A CN111248126 A CN 111248126A
- Authority
- CN
- China
- Prior art keywords
- field
- ditch
- rice
- snails
- rice field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 118
- 235000009566 rice Nutrition 0.000 title claims abstract description 118
- 241000237858 Gastropoda Species 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000009395 breeding Methods 0.000 title claims abstract description 24
- 230000001488 breeding effect Effects 0.000 title claims abstract description 24
- 240000007594 Oryza sativa Species 0.000 title abstract 2
- 241000209094 Oryza Species 0.000 claims abstract description 117
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000003306 harvesting Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 97
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 241000565675 Oncomelania Species 0.000 abstract 1
- 230000006872 improvement Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 10
- 239000004033 plastic Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 7
- 230000002354 daily effect Effects 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 241000238557 Decapoda Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/51—Culture of aquatic animals of shellfish of gastropods, e.g. abalones or turban snails
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/003—Aquaria; Terraria
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K74/00—Other catching nets or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Botany (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention relates to a technological method for cultivating river snails in a rice field, which mainly comprises the steps of rice field transformation technology, mesh sheet laying, rice transplanting, snail stocking, feeding and management, fishing and harvesting. The invention carries out innovative process design transformation on the rice field, and the main improvement points are as follows: the whole paddy field is reformed into a shape with high middle and low periphery, a deep groove is dug at the inner side of the field foundation, and a layer of net sheet is laid at the bottom of the deep groove so as to capture the river snails. Common rice fields can be transformed into high-yield and high-efficiency comprehensive breeding fields of the rice snails through transformation. Compared with the common comprehensive planting and breeding field, the invention has the advantages of water retention and seed preservation overwintering function, convenient feeding, saving of stocking and fishing labor cost, great increase of harvesting rate, reduction of casualty rate and the like, and obviously improves the comprehensive planting and breeding yield and benefit of the oncomelania.
Description
Technical Field
The invention relates to a method for cultivating river snails, in particular to a technical method for cultivating river snails in a rice field, belonging to the technical field of aquaculture.
Background
The river snail is suitable for being inhabited in shallow water such as fields, ponds, ditches, low-lying areas, wetlands and the like. In recent years, the market demand of the river snails is getting larger and larger, the field fishing is gradually changed into artificial cultivation, and particularly, the cultivation in the rice field is faster. At present, the method for breeding the river snails in the rice field is simple, but does not solve the problem of mutual influence of seeds, culture, water and the like, and the method for breeding the river snails in the rice field is difficult to catch, high in missing catch rate (generally reaching 10-30 percent of the total output), high in casualty rate (generally reaching 10-20 percent of the total output) and low in yield (generally 100-300 kg/667 square meters); secondly, annular ditches are dug around the field foundation, and cross, field and mu-shaped ditches are dug in the middle, so that the yield of the method is improved, but the method has the problems of more and shallow ditches, easily dried water, occupation of excessive rice field area, difficulty in capturing the field snails, high capture leakage rate, high casualty rate, low yield and the like.
Some current technical schemes also consider the problems, for example, some people place net cages (such as Chinese patent applications CN106069954A and CN 107873441A) in ditches dug in the rice field and throw snails into the net cages for culture, so that the method is convenient to manage and capture, but the method has high cost and low yield (only utilizes ditches with small area in the rice field for culture), and the escargots cannot grow in wide rice fields and can not play the main function of ecological comprehensive culture of the rice fields. Some technical schemes cover the bottom of the outer ring ditch with a nylon net, which only plays a role in preventing the crabs from digging holes and drilling mud (such as Chinese patent application CN 109122084A). At present, the method for cultivating the river snails in the rice field needs to select a paddy field with better conditions, most of the river snails can be cultivated only in summer when the water quantity is sufficient, and the river snails cannot be cultivated in winter after the paddy field is dried. In addition, the methods do not consider and fully utilize the ecological characteristic relationship between the seeds and the nutrients, so that the comprehensive planting and breeding ecological function cannot be exerted to the maximum extent. Therefore, a brand-new paddy field snail breeding process method needs to be developed and designed, the ecological function of comprehensive breeding of the river snails can be exerted, and the series problems of difficult fishing, high missing rate, high casualty rate, low yield and the like of the river snails are solved, so that the comprehensive breeding benefit of the river snails is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technological method for cultivating the river snails in the rice field is simple and practical, is easy to operate and apply, and basically solves a series of problems of difficulty in fishing, high labor cost, low fishing rate, high casualty rate, low yield and benefit and the like of the river snails cultivated in the rice field.
The technical scheme for solving the technical problems is as follows: a process method for cultivating river snails in rice fields comprises the following steps:
(1) the method comprises the steps of modifying a ① rice field plane into an inclined plane, modifying the whole rice field into a shape with a middle height and gradually reduced towards the periphery, ② digging a deep groove along the inner side of a paddy field base, digging a ditch around the rice field by a circle, wherein the depth of the ditch, namely the vertical distance from the bottom surface of the ditch to the top surface of the paddy field base, is 1.0-1.5 m, the width of the bottom surface of the ditch is calculated according to the proportion of the area of the ditch to the area of the rice field by 8-12% (namely, the width m of the bottom of the ditch is = square meter x (8-12%)/the length m of the ditch), ③ trimming the paddy field base into a trapezoid with a small top and a large bottom to prevent collapse, wherein the highest position of the field base is 10-20 cm higher than the highest position of the center of the rice field base, ④ seepage-preventing treatment is carried out, the seepage treatment is carried out on the field base without water retention, ⑤ repairing water inlet and outlet by using cement bricks or installing plastic pipes, and;
(2) laying a mesh sheet: laying a layer of net sheets at the bottom of the ditch, wherein the width of the net sheets is 2.5-3.5 times of the width of the ditch bottom;
(3) transplanting rice seedlings and releasing snails: transplanting rice seedlings radially in the direction of the ditch with the highest point of the rice field as the center, namely the row spacing of the rice seedlings gradually becomes wider from the high position of the rice field to the low position of the ditch, and the planting distances of the rice seedlings are the same;
the water level of the ditch is kept between 0.5m and 1.2m, the breeding snails are put into the ditch, the putting amount of the breeding snails in each mu of rice field is 100kg to 200kg, and the specification of the breeding snails is 30 to 50 per kg;
(4) feeding and managing: feeding the river snails once every 1-3 days; the water level is adjusted in daily management, and the water level of the ditch is kept to be 1.0-1.2 m at ordinary times; when water is required to be drained and the field is dried, the water level of the rice field is slowly lowered 3-5 days in advance, the water level difference between two adjacent days is lower than 20cm, and the water level of a ditch is kept at 0.5-0.6 m when the field is dried;
(5) fishing and harvesting: when the river snails are ready to be fished, according to the method for draining water and drying the field in the step (4), the water level of the ditch is 0.5-0.6 m, and then the river snails are fished by taking the water out of the net.
The further technical scheme of the invention is as follows: in the step (1), the slope drop of the rice field is changed into an inclined plane, the specific operation is to stack surface silt from the periphery of a field base to the middle of the field; the anti-seepage treatment is to cover a layer of HDPE anti-seepage film on the inner side of the field foundation.
In the step (2), the net sheets are polyethylene net sheets with or without knots, and the mesh is 2 cm.
In the step (3), the row spacing of seedlings at the high position of the rice field is 8-12 cm, and the row spacing of seedlings at the position close to the lower position of the ditch is 40-45 cm.
In the step (4), the concrete operation of feeding the feed to the river snails is as follows:
the water temperature is less than or equal to 15 ℃ or more than or equal to 35 ℃, and no feed is fed; feeding 1 time of feed every 3 days at the temperature of more than 15 ℃ and less than 20 ℃, wherein the feeding amount is 1-1.5 percent of the weight of the river snail, and uniformly feeding the feed along the ditch; the water temperature is more than or equal to 20 ℃ and less than 35 ℃, the feed is fed for 1 time every 2 days, the feeding amount is 2-3 percent of the weight of the river snail, 70-80 percent of the total feeding amount is fed along the ditch, and the rest feed is fed at the place where the ditch is submerged in the water in the middle direction of the rice field.
The method can transform the conventional rice field into a good comprehensive rice snail breeding field by innovating and modifying the rice field, and has the advantages of water retention and seed preservation overwintering functions, convenience in feeding, saving of stocking and fishing labor cost, great increase of fishing rate and reduction of casualty rate compared with the common comprehensive rice snail breeding field, thereby improving the yield of the rice snails and the comprehensive benefits of rice snail breeding.
Compared with the prior art, the invention has the following beneficial effects in detail:
1. the invention reforms the whole rice field into a shape with a high middle part and a low periphery, forms a topography with a high rice field water ditch low after reforming, ensures that the field snails can climb into a place or ditch with water along the slope of the rice field to grow normally when the rice field is lack of water by utilizing the biological characteristics of the field snails such as water tendency and slow crawling, and solves the problems that the field snails are retained and dispersed in each point of the rice field to drill mud and are difficult to capture (the capture leakage rate and the casualty rate are high when the field snails with the drilled mud are captured) when the flat field is lack of water in the rice field (such as sunning, drought, water discharge capture and the like).
2. The ditch of the invention digs to the depth of 1.0 m-1.5 m, and cover a layer of anti-seepage film to the inside of the field foundation which does not preserve water, does not need to harden the field foundation to produce higher cost, can play a role in preventing water and seepage and protecting the field foundation, and the river snail can live through winter with water safely and preserve the seed, and the operation is simple and convenient, and the original appearance is easy to recover.
3. According to the invention, a layer of net sheet is laid at the bottom of the ditch so as to capture the river snails. When the method is matched with harvesting or drought, water drainage or field drying, the water level of the ditch is ensured not to drop suddenly, the field snails slowly follow the water to the ditch, and the water depth of more than 0.5cm is kept at least, so that the harvesting rate is greatly improved, the casualty rate is reduced, and the cost and the time for manually capturing the snails are reduced. The used polyethylene has knot or non-knot net sheets with meshes of 2cm, in the river snail harvesting season, except that few (less than 2%) young snails produced in the later period can be captured from the meshes in a missing way, most of the river snails with the specification of 10 g/can be conveniently captured by only retracting the net sheets, and the method which is time-consuming and labor-consuming, such as back-and-forth fishing, picking up and digging snails in the whole paddy field and water ditch is not used for capturing.
Drawings
FIG. 1: the invention discloses a profile schematic diagram of a rice field reformed into a shape with a high middle part and a low periphery.
FIG. 2: the seedling arrangement mode of the invention is shown schematically.
In the figure: 1-field base, 2-ditch, 3-rice field surface (inclined plane), 4-rice field central area, 5-seedling.
Detailed Description
Example 1
A process method for cultivating river snails in a rice field mainly comprises the following steps:
(1) the rice field transformation process comprises the following steps: the method is characterized in that the rice field with the area of 1220 square meters (about 32m multiplied by 38 m) is stacked from the periphery to the middle of a field foundation by using a small machine, and the whole rice field is transformed into a shape with the middle higher and the periphery lower (as shown in figure 1), wherein the slope drop is about 15%. Then, the inner side of the field is dug, and the ditch surrounds the rice field for one circle. The ditch is 1m deep and 0.9m wide at the bottom. Meanwhile, the dug-out bottom mud is used for reinforcing and heightening the field foundation, and the field foundation is made into a trapezoid with a small upper part and a big lower part. The height of the raised field base is higher than the height of the whole rice field submerged by water at ordinary times, and is 15cm higher than the center of the field. The rice field can not retain water and pass the winter originally, so a layer of HDPE impermeable film needs to be covered on the inner side of the field foundation. Plastic pipes (L-shaped) with the diameter of 100cm are respectively arranged at the water inlet and the water outlet of the rice field, and pipe orifices at two ends are tightly bound by plastic mesh bags.
(2) Laying a mesh sheet: a layer of net sheet is laid at the bottom of the ditch, the mesh is 2cm, the width is 2.8m, and the length of each net sheet is 12 m. When laying, the bottom net is pressed and sunk at the bottom of the ditch by using field mud after the horizontal planes on the two sides of the net sheet surface are adjusted to be consistent. And the net piece on one side of the field base is hoisted by a string to be fixed on the shore.
(3) Transplanting rice seedlings and releasing snails: transplanting seedlings radially in the direction of the ditch with the highest point of the rice field as the center, namely the row spacing of the seedlings gradually becomes wider from the high position of the rice field to the low position of the ditch, the gap between the two rows of seedlings is communicated with the ditch, the row spacing is 10cm from the center of the rice field, the row spacing gradually becomes wider towards the ditch, the row spacing is 40cm from the edge of the ditch, and the plant spacing is unchanged according to 12 cm.
The water level of the ditch is kept between 0.5m and 1.2m, and the seed snails are put into the ditch, wherein the putting amount of the seed snails in each mu of the paddy field is 152kg (41 seeds/kg in specification).
(4) Feeding and managing: feeding the river snails once every 1-3 days; the water level is adjusted well in daily management, and the water level of the ditch is kept to be 1.0-1.2 m constantly. When the water is drained in the sunning field, the water level of the rice field is slowly lowered 3 days ahead until water exists in the ditch, the water level difference between two adjacent days is lower than 20cm, and the water level of the ditch is kept at 0.5-0.6 m at the lowest.
(5) And (4) fishing and harvesting, namely slowly reducing the water level to 0.5-0.6 m 3 days in advance when the river snails are ready to be fished, reducing the water level of the rice field by no more than 20cm every day, and taking up the net with water. 2, each person moves to one end of the net sheet, pulls up and packs the net sheet towards the middle, and screens and washes away the sludge on the net sheet back and forth. Collecting the river snails after gathering in the net sheets, screening out the seed snails, putting the seed snails into a ditch paved with the net sheets (the net sheets can be reused for many times) again, and keeping the water level of 0.5-1.2 m for overwintering.
Example 2
A process method for cultivating river snails in a rice field mainly comprises the following steps:
(1) the rice field transformation process comprises the following steps: the method is characterized in that a rice field with the area of 2000 square meters (about 50m multiplied by 40 m) is stacked from the periphery to the middle of a field foundation by a small machine, the whole rice field is transformed into a shape with the middle higher and the periphery lower, and the slope drop is about 12%. Then, the inner side of the field is dug, and the ditch surrounds the rice field for one circle. The ditch is 1.2m deep and 1.1m wide at the bottom. Meanwhile, the dug-out bottom mud is used for reinforcing and heightening the field foundation, and the field foundation is made into a trapezoid with a small upper part and a big lower part. The height of the raised field base is higher than the height of the whole rice field submerged by water at ordinary times, and is about 12cm higher than the center of the field. The original rice field can not retain water and can not pass winter, and a layer of HDPE impermeable film needs to be covered on the inner side of the field foundation. Plastic pipes (L-shaped) with the diameter of 200cm are respectively arranged at the water inlet and the water outlet of the rice field, and pipe orifices at two ends are tightly bound by plastic mesh bags.
(2) Laying a mesh sheet: a layer of net sheet is laid at the bottom of the ditch, the mesh is 2cm, the width is 3.3m, and the length of each net sheet is 10 m. When laying, the bottom net is pressed and sunk at the bottom of the ditch by using field mud after the horizontal planes on the two sides of the net sheet surface are adjusted to be consistent. And the net piece on one side of the field base is hoisted by a string to be fixed on the shore.
(3) Transplanting rice seedlings and releasing snails: transplanting seedlings radially in the direction of the ditch with the highest point of the rice field as the center, namely the row spacing of the seedlings gradually becomes wider from the high position of the rice field to the low position of the ditch, the gap between the two rows of seedlings is communicated with the ditch, the row spacing is 12cm from the center of the rice field, the row spacing gradually becomes wider towards the ditch, the row spacing is 42cm from the edge of the ditch, and the plant spacing is unchanged according to 12 cm.
The water level of the ditch is kept between 0.5m and 1.2m, and the seed snails are put into the ditch, wherein the putting amount of the seed snails in each mu of the paddy field is 150kg (39 seeds/kg).
(4) Feeding and managing: feeding the river snails once every 1-3 days; the water level is adjusted well in daily management, and the water level of the ditch is kept to be 1.0-1.2 m constantly. When the water is drained in the sunning field, the water level of the rice field is slowly lowered to the state that only the ditch has water in advance for 4 days, the water level difference between two adjacent days is lower than 20cm, and the water level of the ditch is kept between 0.5m and 0.6 m.
(5) And (4) fishing and harvesting, namely slowly reducing the water level to 0.5-0.6 m 3 days in advance when the river snails are ready to be fished, reducing the water level of the rice field by no more than 20cm every day, and taking up the net with water. 2, each person moves to one end of the net sheet, pulls up and packs the net sheet towards the middle, and screens and washes away the sludge on the net sheet back and forth. Collecting the field snails in a container after the field snails are gathered in the net piece, putting the net piece into the ditch again for fixing, screening the breeding snails, putting the breeding snails into the ditch again, and keeping the water level of 0.8-1.2 m in the ditch for overwintering.
Example 3
A process method for cultivating river snails in a rice field mainly comprises the following steps:
(1) the rice field transformation process comprises the following steps: the area of the rice field is 3600 square meters (about 80m multiplied by 45 m), sludge on the surface layer of the rice field is stacked from the periphery of a field foundation to the middle of the field by a small machine, the whole rice field is transformed into a shape with a high middle and a low periphery, and the slope drop is about 10 percent. Then, the inner side of the field is dug, and the ditch surrounds the rice field for one circle. The ditch is 1.5m deep and 1.4m wide at the bottom. Meanwhile, the dug-out bottom mud is used for reinforcing and heightening the field foundation, and the field foundation is made into a trapezoid with a small upper part and a big lower part. The height of the raised field base is higher than the height of the whole rice field submerged by water at ordinary times, and is 10cm higher than the center of the field. The rice field can not retain water and pass the winter originally, and a layer of HDPE impermeable film is covered on the inner side of the field base. Plastic pipes (L-shaped) with the diameter of 200cm are arranged at the water inlet and outlet of the rice field, and pipe orifices at two ends are tightly bound by plastic mesh bags.
(2) Laying a mesh sheet: and a layer of polyethylene knotted or non-knotted net sheet is laid at the bottom of the ditch, the mesh is 2cm, the width is 4m, and the length of each net sheet is 15 m. When laying, the bottom net is pressed and sunk at the bottom of the ditch by using field mud after the horizontal planes on the two sides of the net sheet surface are adjusted to be consistent. And the net piece on one side of the field base is hoisted by a string to be fixed on the shore.
(3) Transplanting rice seedlings and releasing snails: transplanting seedlings radially in the direction of the ditch with the highest point of the rice field as the center, namely the row spacing of the seedlings gradually becomes wider from the high position of the rice field to the low position of the ditch, the gap between the two rows of seedlings is communicated with the ditch, the row spacing is 10cm from the center of the rice field, the row spacing gradually becomes wider towards the ditch, the row spacing is 45cm from the edge of the ditch, and the plant spacing is unchanged according to 10 cm.
The water level of the ditch is kept between 0.5m and 1.2m, and the seed snails are put into the ditch, wherein the putting amount of the seed snails in each mu of the paddy field is 165kg (the specification is 35 snails per kg).
(4) Feeding and managing: feeding the river snails once every 1-3 days; the water level is adjusted well in daily management, and the water level of the ditch is kept to be 1.0-1.2 m constantly. When the water is drained in the sunning field, the water level of the rice field is slowly lowered to the state that only the ditch has water in advance for 4 days, the water level difference between two adjacent days is lower than 20cm, and the water level of the ditch is kept between 0.5m and 0.6 m.
(5) And (4) fishing and harvesting, namely slowly reducing the water level to 0.5-0.6 m 5 days ahead when the river snails are ready to be fished, reducing the water level of the rice field by no more than 20cm every day, and taking up the net with water. 2, each person moves to one end of the net sheet, slowly pulls up the net sheet and folds the net sheet towards the middle, and the person can sieve and wash the sludge on the net sheet back and forth. Collecting the field snails in a container after the field snails are gathered in the net piece, putting the net piece into the ditch again for fixing, screening the breeding snails, putting the breeding snails into the ditch again, and keeping the water level of 0.8-1.2 m in the ditch for overwintering.
In each embodiment of the invention, the mesh is a polyethylene knotted or non-knotted mesh.
In each embodiment of the invention, the concrete operation of feeding the feed to the river snails is as follows:
the water temperature is less than or equal to 15 ℃ or more than or equal to 35 ℃, and no feed is fed; feeding 1 time of feed every 3 days at the temperature of more than 15 ℃ and less than 20 ℃, wherein the feeding amount is 1-1.5 percent of the weight of the river snail, and uniformly feeding the feed along the ditch; the water temperature is more than or equal to 20 ℃ and less than 35 ℃, the feed is fed for 1 time every 2 days, the feeding amount is 2-3 percent of the weight of the river snail, 70-80 percent of the total feeding amount is fed along the ditch, and the rest feed is fed at the place where the ditch is submerged in the water in the middle direction of the rice field.
Comparative test
In the same time period, the process method for cultivating the river snails in the rice field described in the above embodiments 1 to 3 is adopted, and meanwhile, 3 groups of rice fields with similar areas are additionally arranged and used as a control group by adopting a conventional method for cultivating the river snails, except that the control group excavates the rice field into 'field' shaped ditches (the ditches are 0.5m deep and 0.5m wide, and the water depth is controlled to be 0.1m to 0.6m in the cultivation process) according to the conventional method, no anti-seepage film is installed on the field base, no net sheet is installed on the ditches, the parallel seedling transplanting is carried out according to the conventional method, the conventional feeding method and the capturing method of fishing snails and manually picking snails are adopted, and besides, the seed throwing amount, the feed throwing amount, the daily management, the cultivation period and other methods are the same as the corresponding embodiments. The results of the comparative tests are shown in Table 1 below.
TABLE 1 comparison table of harvest of river snail in the present invention and control group
Note: 1. the missing capture rate refers to the result of calculating the number of the missing snails by thoroughly inspecting the rice field and the water ditch again after the conventional capture is finished.
2. The mortality rate includes the number of dead and damaged snails.
Claims (5)
1. A process method for cultivating river snails in a rice field is characterized by comprising the following steps:
(1) ①, modifying a plane of a rice field into an inclined plane, modifying the whole rice field into a shape with a middle height and gradually reduced towards the periphery, ② digging a deep groove along the inner side of a field base, digging a ditch around the rice field for a circle, wherein the depth of the ditch, namely the vertical distance from the bottom surface of the ditch to the top surface of the field base, is 1.0-1.5 m, and the width of the bottom surface of the ditch is calculated according to the area of the ditch accounting for 8-12% of the area of the rice field, ③ trimming the field base according to a trapezoid with a small upper part and a big lower part, wherein the highest part of the field base is 10-20 cm higher than the highest part of the center of the rice field and is heightened and consolidated;
(2) laying a mesh sheet: laying a layer of net sheets at the bottom of the ditch, wherein the width of the net sheets is 2.5-3.5 times of the width of the ditch bottom;
(3) transplanting rice seedlings and releasing snails: transplanting rice seedlings radially in the direction of the ditch with the highest point of the rice field as the center, namely the row spacing of the rice seedlings gradually becomes wider from the high position of the rice field to the low position of the ditch, and the planting distances of the rice seedlings are the same;
the water level of the ditch is kept between 0.5m and 1.2m, the breeding snails are put into the ditch, the putting amount of the breeding snails in each mu of rice field is 100kg to 200kg, and the specification of the breeding snails is 30 to 50 per kg;
(4) feeding and managing: feeding the river snails once every 1-3 days; the water level is adjusted in daily management, and the water level of the ditch is kept to be 1.0-1.2 m at ordinary times; when water is required to be drained and the field is dried, the water level of the rice field is slowly lowered 3-5 days in advance, the water level difference between two adjacent days is lower than 20cm, and the water level of a ditch is kept at 0.5-0.6 m when the field is dried;
(5) fishing and harvesting: when the river snails are ready to be fished, according to the method for draining water and drying the field in the step (4), the water level of the ditch is 0.5-0.6 m, and then the river snails are fished by taking the water out of the net.
2. The process for cultivating river snails in rice fields according to claim 1, wherein the process comprises the following steps: in the step (1), the slope drop of the rice field is changed into an inclined plane, the specific operation is to stack surface silt from the periphery of a field base to the middle of the field; the anti-seepage treatment is to cover a layer of HDPE anti-seepage film on the inner side of the field foundation.
3. The process for cultivating river snails in rice fields according to claim 1 or 2, wherein the process comprises the following steps: in the step (2), the net sheets are polyethylene net sheets with or without knots, and the mesh is 2 cm.
4. The process for cultivating river snails in rice fields according to claim 1 or 2, wherein the process comprises the following steps: in the step (3), the row spacing of seedlings at the high position of the rice field is 8-12 cm, and the row spacing of seedlings at the position close to the lower position of the ditch is 40-45 cm.
5. The process for cultivating river snails in rice fields according to claim 1 or 2, wherein the process comprises the following steps: in the step (4), the concrete operation of feeding the feed to the river snails is as follows:
the water temperature is less than or equal to 15 ℃ or more than or equal to 35 ℃, and no feed is fed; feeding 1 time of feed every 3 days at the temperature of more than 15 ℃ and less than 20 ℃, wherein the feeding amount is 1-1.5 percent of the weight of the river snail, and uniformly feeding the feed along the ditch; the water temperature is more than or equal to 20 ℃ and less than 35 ℃, the feed is fed for 1 time every 2 days, the feeding amount is 2 to 3 percent of the weight of the river snail, 70 to 80 percent of the total feeding amount is fed along the ditch, and the rest feed is fed at the place where the ditch is submerged in the water in the middle direction of the rice field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010253972.7A CN111248126A (en) | 2020-04-02 | 2020-04-02 | Technological method for breeding river snails in rice field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010253972.7A CN111248126A (en) | 2020-04-02 | 2020-04-02 | Technological method for breeding river snails in rice field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111248126A true CN111248126A (en) | 2020-06-09 |
Family
ID=70942146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010253972.7A Pending CN111248126A (en) | 2020-04-02 | 2020-04-02 | Technological method for breeding river snails in rice field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111248126A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111990300A (en) * | 2020-06-17 | 2020-11-27 | 刘洪健 | Method for breeding crabs in paddy field |
| CN116077550A (en) * | 2023-02-14 | 2023-05-09 | 柳州市渔业技术推广站 | Chinese herbal medicine preparation for stimulating fresh water snail shell-out activity and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106804547A (en) * | 2017-01-13 | 2017-06-09 | 山东通和水产有限公司 | A kind of pre-buried harvesting net system of shellfish culture |
| CN108718964A (en) * | 2018-05-11 | 2018-11-02 | 柳州市柳南区动物疫病预防控制中心 | The method of water planting rice paddy field aquaculture river snail |
| CN110476753A (en) * | 2019-09-19 | 2019-11-22 | 深圳市厚朴文化传媒有限公司 | A kind of mesona, cray, rice symbiotic cultivation system |
-
2020
- 2020-04-02 CN CN202010253972.7A patent/CN111248126A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106804547A (en) * | 2017-01-13 | 2017-06-09 | 山东通和水产有限公司 | A kind of pre-buried harvesting net system of shellfish culture |
| CN108718964A (en) * | 2018-05-11 | 2018-11-02 | 柳州市柳南区动物疫病预防控制中心 | The method of water planting rice paddy field aquaculture river snail |
| CN110476753A (en) * | 2019-09-19 | 2019-11-22 | 深圳市厚朴文化传媒有限公司 | A kind of mesona, cray, rice symbiotic cultivation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111990300A (en) * | 2020-06-17 | 2020-11-27 | 刘洪健 | Method for breeding crabs in paddy field |
| CN116077550A (en) * | 2023-02-14 | 2023-05-09 | 柳州市渔业技术推广站 | Chinese herbal medicine preparation for stimulating fresh water snail shell-out activity and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102668831B (en) | Submerged plant breeding blanket and application thereof | |
| CN108834462B (en) | Vegetation configuration method for preventing and treating water and soil loss of dry-hot valley gully development area | |
| CN104798656B (en) | The long tree-planting method of weathered rockses falling zone terrestrial water | |
| CN104402117B (en) | Water body purification landscape floating wetland constructing system and construction method | |
| CN106688357A (en) | Iron mine waste land vegetation recovery method | |
| CN205266347U (en) | Synthesize device that founds and manage aquatic plant community | |
| CN104787891A (en) | Algal blooming ecological control system based on micro-terrain reconstruction, ecological method for controlling algal blooming and application | |
| CN111248126A (en) | Technological method for breeding river snails in rice field | |
| CN204539762U (en) | A kind of numb coconut palm geotechnical grid stereo plant carpet repaired for side slope | |
| CN102257915A (en) | Method for transversely growing yam and interplanting spring and autumn potato under coverage of straw | |
| CN105248141A (en) | Plant planting method for boulder beach | |
| CN106576722B (en) | Method for carrying out sphagnum planting recovery on alpine wetland | |
| Lo | Environmental impact on the development of agricultural technology in China: the case of the dike-pond (‘jitang’) system of integrated agriculture-aquaculture in the Zhujiang Delta of China | |
| CN102017851A (en) | Cyperus planting and harvesting technology | |
| CN110178473A (en) | The application of dewatered sludge landfill field ecological restoring method and afforestation trimming waste | |
| CN102742432B (en) | Method for no-tillage plantation of grassland in water-level-fluctuating zone | |
| CN103039405A (en) | Method for mass-producing palatable live bait water earthworms for eel offspring seeds | |
| CN110521521A (en) | A kind of method of desertification soil rice cultivation | |
| Mishra et al. | Water management and conservation innovations for doubling farmers’ income | |
| CN104929091A (en) | Farmland water filtering control and soil amelioration desalination persistent blind drain | |
| Turner | The importance of dambos in African agriculture | |
| CN202285516U (en) | Ecological comprehensive improvement facility of saline-alkali soil | |
| CN111727871A (en) | Hard substrate anchoring type aquatic plant rapid field planting method | |
| CN106717878A (en) | A kind of wetland eco-reconstruction method | |
| CN213539018U (en) | River side slope protection soil stabilization structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200609 |
|
| RJ01 | Rejection of invention patent application after publication |